Sudden infant death syndrome among extremely preterm infants: United States 1997-1999.
D004522:Educational Status; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D007235:Infant, Premature, Diseases / Q000453:epidemiology* / Q000401:mortality; D016015:Logistic Models; D016017:Odds Ratio; D010298:Parity; D012307:Risk Factors; D012959:Socioeconomic Factors; D013398:Sudden Infant Death / Q000453:epidemiology*; D014481:United States / Q000453:epidemiology